nissan doesn't offer one. probably because (according to the service manual), every time you pull off the shift knob for whatever reason, you're supposed to replace it with a new one. !!! wtf is that all about?
notice the X next to the knob. that means:
i don't freakin get it. but i think i'ma order an aftermarket one and see what i can do with it anyway.
The sad thing is.... that means set screw bullshit...
The thing that sucks about this (and I know this sounds lame) is that one of the reasons I bought a manual is so that I could have full control over customization of the interior, including shift knob. Now while I can still add a knob, anyone that's had both set screw types and threaded types knows how horrible set screws are.